Window-sash fastener.



B. R. WELKER.

WINDOW SASH FASTENEB.

APPLICATION Hum 001', a, 1910.

Patented se t. 12,1911.

UNITED STATES TENT OFFICE.

ELMER R. WELKER, OF KANSAS CITY, MISSOURI.

WINDOW-SASH FASTENER.

To all whom it may concern:

Be it known that T, ELMER R. VVELKER, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Window- Sash Fasteners, of which the following is a specification.

This invention relates to window sash fasteners, and has for its object the production of a device of this character inaccessible to a person at the outer side of the window, which will positively limit the upward movement of the lower sash and the downward movement of the upper sash and which may be located to effectually guard against the entrance of a person through the window without interfering with the circulation of the air therethrough.

A further object is to produce a device of the character mentioned which may be adjusted to avoid interfering with the free travel of either of the sashes.

With these objects in view the invention consists in certain novel and peculiar features of construction and organization as hereinafter described and claimed; and in order that it may be fully understood reference is to be had to the accompanying drawing, in which- Figure 1, is a perspective view of a frag ment of a window equipped with a sash fastener embodying my invention. Fig. 2, is an enlarged vetrical section on the line IIII of Fig. 1. Fig. 3, is a detail per spective view of the bar constituting the casing of the fastener.

In the said drawing, 1 indicates the window casing, 2 the lower sash, and 3 the upper sash of a window. The upper sash of the window is provided at a suitable distance above its lower rail with a vertical recess 4:, and fitting therein, is a bar 5, constituting the casing of the fastener, a screw 6 extending through said bar into the upper sash to secure the former rigidly in position.

7 is a longitudinal slot in and opening through the inner face of the bar.

8 is a longitudinal slot formed in the bar and communicating at its lower end with the rear part of slot 7, and 9, is a pin secured to the bar and projecting rearwardly into slot 8, and equipped within the latter with an expansive coiled spring 10. Above the pin 9 the inner face of the bar is pro- Specification of Letters Patent.

Application filed October 3, 1910.

Patented Sept. 12, 1911.

Serial No. 585,137.

vided with a longitudinally extending recess 11 connecting said recess with slot 8 is a large slot 12, and fitting slidingly in slot 8 is a block 13 provided at its lower end with a pair of notches 1 1 and 15, and said block is provided with a stem 16, fitting slidingly in slot 12, and riveted or otherwise secured on stem 16, and susceptible of sliding up and down in recess 11, is a head 17, said head by preference lying wholly within recess ll and mounted on a pivot 18, extending across the upper end of slot 7.

Carried by the bar 5, is a catch 19 susceptible of lying wholly within slot 7 to avoid interfering withthe free upward and downward travel. of the lower or the upper sash as hereinafter explained or of projecting at its lower end beyond the inner face of the bar as shown in Figs. 1 and 2, and said catch is provided at its upper end with an arm 20, projecting upwardly into slot 8 and provided with a hole 21 loosely receiving the rear end of pin 9, the arrangement be ing such that spring 10 shall exert an outward pressure on said arm 20, for the purpose of pivotally swinging the lower end of the catch to the position shown in Figs. 1 and 2.

The fastener is preferably arranged so that the lower end of the catch shall be disposed about six inches above the lower sill of the upper sash so that when the catch, is in operative position as shown by Figs. 1 and 2, it will be impossible to lower the upper sash more than six inches or to raise the lower sash a greater distance as the lower end of the catch when in operative position as explained overhangs the lower sash, wear upon the latter being prevented by providing it with a recess 22, in which is secured a wear plate 23, it being obvious that the lower sash may be raised and the upper sash lowered a distance which conjointly is determined between the lower end of the catch and the upper side of the lower rail of the upper sash.

During the day when it is not desired to interfere with the free travel of the sashes the catch is repressed until it lies wholly within the slot 7 and pressure is applied on the head 17 to slide the same and hence the connected block 13 downward until the notch 14 receives the upper end of the arm 20 of the catch and thus holds the latter in its repressed or inoperative position. At night the head and block is slid upward to permit the "spring to project the catch to operative position and then the head and block are relowered until the notch 15 engages the upper end of the arm of the catch and thus locks the same, in its projected .or operative position to positively limit the upward movement of the lower sash or downward movement of the upper sash.

It will be apparent that by arranging the head 17 in the recess '11 and beveling or rounding said head at its ends as shown, it will be impossible for a person at the outer side to lower the upper sash until it is arrested by the engagement of the catch with the plate 23 and then by reaching through the upper sash obtain a sutlicient grip upon the head to raise the same and free the catch so that the latter may be repressed until the window sash can be forced downward until the catch clears plate 23, it being also noticed,

that the head 17 is of sufficient size to completely cover slot 12-and thus prevent a hook being inserted in said slot to raise the block and free the catch.

From the above description it will be ap parent that I have produced a window sash ;-trated and described the preferred embodiment of the invention I wish it to be understood that I do not desire to be-restricted to the exact details of construction shown and described as obvious modifications will sugj gest themselves to one skilled in the art.

I claim l. A window sash fastener, comprising a bar provided with a longitudinal slot opening through its inner face, a second slot com- 1 municating at its lower end with the back part of the first-named slot, and a third slot extending through the bar from its inner face to the upper part of the said second slot, a catch fitting in the first-named slot and pivoted nearthe upper end of the latter to the bar and susceptible of lying wholly within said slot or of projecting at its lower end therefrom beyond the inner face of the bar and provided at its upper end with an apertured arm projecting upwardly into the said second slot, a pin projecting from the bar loosely through the aperture of said arm, a coiled spring mounted on the pin and interposed between and bearing against the bar and said arm and tending to project the lower end of the catch beyond the inner face of the bar, a slidable block in the second slot provided with a pair of notches in its lower end and with a stem projecting into said third slot, and a head secured to said stem and engaging the inner face of the bar and covering said third slot.

2. A window sash fastener, comprising a bar provided with a longitudinal slot opening through its inner face, a-second slot coinmunicating at its lower end with the back part of the first-named slot, and a third slot extending through the bar from its inner face to the upper part of the said second slot, said bar being provided also with a recess in its inner face communicating the said third slot, a catch fitting in the first-named slot, and pivoted near the upper end'of the latter to the bar and susceptible of lying wholly within said slot or of projecting at its lower end therefrom beyond the inner face of the bar and provided at its upper end with an apertured arm projecting upwardly into the said second slot, a pin projecting from the bar loosely through theaperture of said arm, a coiled spring mounted on the pin and interposed between and bearing against the bar and said arm and tending to projectthe lower end of the catch beyond the inner face of the bar, a slidable block in the second slot provided with a pair of notches in its lower end and with a stem projecting into said third slot, and a head fitting in "the recess of the bar and secured to said stem and beveled at its front end and covering said third slot.-

In testimony whereof I affix my signature, in the presence of two witnesses.

ELMER It. VVELKER.

lVitnesses W. A. MERRIMAN, ROY L. STORMS.

7 Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

